4 * R/O (V)FAT 12/16/32 filesystem implementation by Marcus Sundberg
6 * 2002-07-28 - rjones@nexus-tech.net - ported to ppcboot v1.1.6
7 * 2003-03-10 - kharris@nexus-tech.net - ported to uboot
9 * See file CREDITS for list of people who contributed to this
12 * This program is free software; you can redistribute it and/or
13 * modify it under the terms of the GNU General Public License as
14 * published by the Free Software Foundation; either version 2 of
15 * the License, or (at your option) any later version.
17 * This program is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU General Public License for more details.
22 * You should have received a copy of the GNU General Public License
23 * along with this program; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
32 #include <asm/byteorder.h>
35 #include <linux/compiler.h>
36 #include <linux/ctype.h>
38 #ifdef CONFIG_SUPPORT_VFAT
39 static const int vfat_enabled
= 1;
41 static const int vfat_enabled
= 0;
45 * Convert a string to lowercase.
47 static void downcase(char *str
)
49 while (*str
!= '\0') {
55 static block_dev_desc_t
*cur_dev
;
56 static disk_partition_t cur_part_info
;
58 #define DOS_BOOT_MAGIC_OFFSET 0x1fe
59 #define DOS_FS_TYPE_OFFSET 0x36
60 #define DOS_FS32_TYPE_OFFSET 0x52
62 static int disk_read(__u32 block
, __u32 nr_blocks
, void *buf
)
64 if (!cur_dev
|| !cur_dev
->block_read
)
67 return cur_dev
->block_read(cur_dev
->dev
,
68 cur_part_info
.start
+ block
, nr_blocks
, buf
);
71 int fat_set_blk_dev(block_dev_desc_t
*dev_desc
, disk_partition_t
*info
)
73 ALLOC_CACHE_ALIGN_BUFFER(unsigned char, buffer
, dev_desc
->blksz
);
76 cur_part_info
= *info
;
78 /* Make sure it has a valid FAT header */
79 if (disk_read(0, 1, buffer
) != 1) {
84 /* Check if it's actually a DOS volume */
85 if (memcmp(buffer
+ DOS_BOOT_MAGIC_OFFSET
, "\x55\xAA", 2)) {
90 /* Check for FAT12/FAT16/FAT32 filesystem */
91 if (!memcmp(buffer
+ DOS_FS_TYPE_OFFSET
, "FAT", 3))
93 if (!memcmp(buffer
+ DOS_FS32_TYPE_OFFSET
, "FAT32", 5))
100 int fat_register_device(block_dev_desc_t
*dev_desc
, int part_no
)
102 disk_partition_t info
;
104 /* First close any currently found FAT filesystem */
107 /* Read the partition table, if present */
108 if (get_partition_info(dev_desc
, part_no
, &info
)) {
110 printf("** Partition %d not valid on device %d **\n",
111 part_no
, dev_desc
->dev
);
116 info
.size
= dev_desc
->lba
;
117 info
.blksz
= dev_desc
->blksz
;
121 #ifdef CONFIG_PARTITION_UUIDS
126 return fat_set_blk_dev(dev_desc
, &info
);
130 * Get the first occurence of a directory delimiter ('/' or '\') in a string.
131 * Return index into string if found, -1 otherwise.
133 static int dirdelim(char *str
)
137 while (*str
!= '\0') {
138 if (ISDIRDELIM(*str
))
146 * Extract zero terminated short name from a directory entry.
148 static void get_name(dir_entry
*dirent
, char *s_name
)
152 memcpy(s_name
, dirent
->name
, 8);
155 while (*ptr
&& *ptr
!= ' ')
157 if (dirent
->ext
[0] && dirent
->ext
[0] != ' ') {
160 memcpy(ptr
, dirent
->ext
, 3);
162 while (*ptr
&& *ptr
!= ' ')
166 if (*s_name
== DELETED_FLAG
)
168 else if (*s_name
== aRING
)
169 *s_name
= DELETED_FLAG
;
174 * Get the entry at index 'entry' in a FAT (12/16/32) table.
175 * On failure 0x00 is returned.
177 static __u32
get_fatent(fsdata
*mydata
, __u32 entry
)
184 switch (mydata
->fatsize
) {
186 bufnum
= entry
/ FAT32BUFSIZE
;
187 offset
= entry
- bufnum
* FAT32BUFSIZE
;
190 bufnum
= entry
/ FAT16BUFSIZE
;
191 offset
= entry
- bufnum
* FAT16BUFSIZE
;
194 bufnum
= entry
/ FAT12BUFSIZE
;
195 offset
= entry
- bufnum
* FAT12BUFSIZE
;
199 /* Unsupported FAT size */
203 debug("FAT%d: entry: 0x%04x = %d, offset: 0x%04x = %d\n",
204 mydata
->fatsize
, entry
, entry
, offset
, offset
);
206 /* Read a new block of FAT entries into the cache. */
207 if (bufnum
!= mydata
->fatbufnum
) {
208 __u32 getsize
= FATBUFBLOCKS
;
209 __u8
*bufptr
= mydata
->fatbuf
;
210 __u32 fatlength
= mydata
->fatlength
;
211 __u32 startblock
= bufnum
* FATBUFBLOCKS
;
213 if (startblock
+ getsize
> fatlength
)
214 getsize
= fatlength
- startblock
;
216 startblock
+= mydata
->fat_sect
; /* Offset from start of disk */
218 if (disk_read(startblock
, getsize
, bufptr
) < 0) {
219 debug("Error reading FAT blocks\n");
222 mydata
->fatbufnum
= bufnum
;
225 /* Get the actual entry from the table */
226 switch (mydata
->fatsize
) {
228 ret
= FAT2CPU32(((__u32
*) mydata
->fatbuf
)[offset
]);
231 ret
= FAT2CPU16(((__u16
*) mydata
->fatbuf
)[offset
]);
234 off16
= (offset
* 3) / 4;
236 switch (offset
& 0x3) {
238 ret
= FAT2CPU16(((__u16
*) mydata
->fatbuf
)[off16
]);
242 val1
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
244 val2
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
+ 1]);
246 ret
= (val2
<< 4) | (val1
>> 12);
249 val1
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
251 val2
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
+ 1]);
253 ret
= (val2
<< 8) | (val1
>> 8);
256 ret
= FAT2CPU16(((__u16
*)mydata
->fatbuf
)[off16
]);
257 ret
= (ret
& 0xfff0) >> 4;
264 debug("FAT%d: ret: %08x, offset: %04x\n",
265 mydata
->fatsize
, ret
, offset
);
271 * Read at most 'size' bytes from the specified cluster into 'buffer'.
272 * Return 0 on success, -1 otherwise.
275 get_cluster(fsdata
*mydata
, __u32 clustnum
, __u8
*buffer
, unsigned long size
)
282 startsect
= mydata
->data_begin
+
283 clustnum
* mydata
->clust_size
;
285 startsect
= mydata
->rootdir_sect
;
288 debug("gc - clustnum: %d, startsect: %d\n", clustnum
, startsect
);
290 if ((unsigned long)buffer
& (ARCH_DMA_MINALIGN
- 1)) {
291 ALLOC_CACHE_ALIGN_BUFFER(__u8
, tmpbuf
, mydata
->sect_size
);
293 printf("FAT: Misaligned buffer address (%p)\n", buffer
);
295 while (size
>= mydata
->sect_size
) {
296 ret
= disk_read(startsect
++, 1, tmpbuf
);
298 debug("Error reading data (got %d)\n", ret
);
302 memcpy(buffer
, tmpbuf
, mydata
->sect_size
);
303 buffer
+= mydata
->sect_size
;
304 size
-= mydata
->sect_size
;
307 idx
= size
/ mydata
->sect_size
;
308 ret
= disk_read(startsect
, idx
, buffer
);
310 debug("Error reading data (got %d)\n", ret
);
314 idx
*= mydata
->sect_size
;
319 ALLOC_CACHE_ALIGN_BUFFER(__u8
, tmpbuf
, mydata
->sect_size
);
321 ret
= disk_read(startsect
, 1, tmpbuf
);
323 debug("Error reading data (got %d)\n", ret
);
327 memcpy(buffer
, tmpbuf
, size
);
334 * Read at most 'maxsize' bytes from 'pos' in the file associated with 'dentptr'
336 * Return the number of bytes read or -1 on fatal errors.
338 __u8 get_contents_vfatname_block
[MAX_CLUSTSIZE
]
339 __aligned(ARCH_DMA_MINALIGN
);
342 get_contents(fsdata
*mydata
, dir_entry
*dentptr
, unsigned long pos
,
343 __u8
*buffer
, unsigned long maxsize
)
345 unsigned long filesize
= FAT2CPU32(dentptr
->size
), gotsize
= 0;
346 unsigned int bytesperclust
= mydata
->clust_size
* mydata
->sect_size
;
347 __u32 curclust
= START(dentptr
);
348 __u32 endclust
, newclust
;
349 unsigned long actsize
;
351 debug("Filesize: %ld bytes\n", filesize
);
353 if (pos
>= filesize
) {
354 debug("Read position past EOF: %lu\n", pos
);
358 if (maxsize
> 0 && filesize
> pos
+ maxsize
)
359 filesize
= pos
+ maxsize
;
361 debug("%ld bytes\n", filesize
);
363 actsize
= bytesperclust
;
365 /* go to cluster at pos */
366 while (actsize
<= pos
) {
367 curclust
= get_fatent(mydata
, curclust
);
368 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
369 debug("curclust: 0x%x\n", curclust
);
370 debug("Invalid FAT entry\n");
373 actsize
+= bytesperclust
;
377 actsize
-= bytesperclust
;
381 /* align to beginning of next cluster if any */
383 actsize
= min(filesize
, bytesperclust
);
384 if (get_cluster(mydata
, curclust
, get_contents_vfatname_block
,
385 (int)actsize
) != 0) {
386 printf("Error reading cluster\n");
391 memcpy(buffer
, get_contents_vfatname_block
+ pos
, actsize
);
397 curclust
= get_fatent(mydata
, curclust
);
398 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
399 debug("curclust: 0x%x\n", curclust
);
400 debug("Invalid FAT entry\n");
405 actsize
= bytesperclust
;
409 /* search for consecutive clusters */
410 while (actsize
< filesize
) {
411 newclust
= get_fatent(mydata
, endclust
);
412 if ((newclust
- 1) != endclust
)
414 if (CHECK_CLUST(newclust
, mydata
->fatsize
)) {
415 debug("curclust: 0x%x\n", newclust
);
416 debug("Invalid FAT entry\n");
420 actsize
+= bytesperclust
;
423 /* get remaining bytes */
425 if (get_cluster(mydata
, curclust
, buffer
, (int)actsize
) != 0) {
426 printf("Error reading cluster\n");
432 if (get_cluster(mydata
, curclust
, buffer
, (int)actsize
) != 0) {
433 printf("Error reading cluster\n");
436 gotsize
+= (int)actsize
;
440 curclust
= get_fatent(mydata
, endclust
);
441 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
442 debug("curclust: 0x%x\n", curclust
);
443 printf("Invalid FAT entry\n");
446 actsize
= bytesperclust
;
452 * Extract the file name information from 'slotptr' into 'l_name',
453 * starting at l_name[*idx].
454 * Return 1 if terminator (zero byte) is found, 0 otherwise.
456 static int slot2str(dir_slot
*slotptr
, char *l_name
, int *idx
)
460 for (j
= 0; j
<= 8; j
+= 2) {
461 l_name
[*idx
] = slotptr
->name0_4
[j
];
462 if (l_name
[*idx
] == 0x00)
466 for (j
= 0; j
<= 10; j
+= 2) {
467 l_name
[*idx
] = slotptr
->name5_10
[j
];
468 if (l_name
[*idx
] == 0x00)
472 for (j
= 0; j
<= 2; j
+= 2) {
473 l_name
[*idx
] = slotptr
->name11_12
[j
];
474 if (l_name
[*idx
] == 0x00)
483 * Extract the full long filename starting at 'retdent' (which is really
484 * a slot) into 'l_name'. If successful also copy the real directory entry
486 * Return 0 on success, -1 otherwise.
489 get_vfatname(fsdata
*mydata
, int curclust
, __u8
*cluster
,
490 dir_entry
*retdent
, char *l_name
)
493 dir_slot
*slotptr
= (dir_slot
*)retdent
;
494 __u8
*buflimit
= cluster
+ mydata
->sect_size
* ((curclust
== 0) ?
497 __u8 counter
= (slotptr
->id
& ~LAST_LONG_ENTRY_MASK
) & 0xff;
500 if (counter
> VFAT_MAXSEQ
) {
501 debug("Error: VFAT name is too long\n");
505 while ((__u8
*)slotptr
< buflimit
) {
508 if (((slotptr
->id
& ~LAST_LONG_ENTRY_MASK
) & 0xff) != counter
)
514 if ((__u8
*)slotptr
>= buflimit
) {
519 curclust
= get_fatent(mydata
, curclust
);
520 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
521 debug("curclust: 0x%x\n", curclust
);
522 printf("Invalid FAT entry\n");
526 if (get_cluster(mydata
, curclust
, get_contents_vfatname_block
,
527 mydata
->clust_size
* mydata
->sect_size
) != 0) {
528 debug("Error: reading directory block\n");
532 slotptr2
= (dir_slot
*)get_contents_vfatname_block
;
533 while (counter
> 0) {
534 if (((slotptr2
->id
& ~LAST_LONG_ENTRY_MASK
)
541 /* Save the real directory entry */
542 realdent
= (dir_entry
*)slotptr2
;
543 while ((__u8
*)slotptr2
> get_contents_vfatname_block
) {
545 slot2str(slotptr2
, l_name
, &idx
);
548 /* Save the real directory entry */
549 realdent
= (dir_entry
*)slotptr
;
554 if (slot2str(slotptr
, l_name
, &idx
))
556 } while (!(slotptr
->id
& LAST_LONG_ENTRY_MASK
));
559 if (*l_name
== DELETED_FLAG
)
561 else if (*l_name
== aRING
)
562 *l_name
= DELETED_FLAG
;
565 /* Return the real directory entry */
566 memcpy(retdent
, realdent
, sizeof(dir_entry
));
571 /* Calculate short name checksum */
572 static __u8
mkcksum(const char name
[8], const char ext
[3])
578 for (i
= 0; i
< 8; i
++)
579 ret
= (((ret
& 1) << 7) | ((ret
& 0xfe) >> 1)) + name
[i
];
580 for (i
= 0; i
< 3; i
++)
581 ret
= (((ret
& 1) << 7) | ((ret
& 0xfe) >> 1)) + ext
[i
];
587 * Get the directory entry associated with 'filename' from the directory
588 * starting at 'startsect'
590 __u8 get_dentfromdir_block
[MAX_CLUSTSIZE
]
591 __aligned(ARCH_DMA_MINALIGN
);
593 static dir_entry
*get_dentfromdir(fsdata
*mydata
, int startsect
,
594 char *filename
, dir_entry
*retdent
,
597 __u16 prevcksum
= 0xffff;
598 __u32 curclust
= START(retdent
);
599 int files
= 0, dirs
= 0;
601 debug("get_dentfromdir: %s\n", filename
);
608 if (get_cluster(mydata
, curclust
, get_dentfromdir_block
,
609 mydata
->clust_size
* mydata
->sect_size
) != 0) {
610 debug("Error: reading directory block\n");
614 dentptr
= (dir_entry
*)get_dentfromdir_block
;
616 for (i
= 0; i
< DIRENTSPERCLUST
; i
++) {
617 char s_name
[14], l_name
[VFAT_MAXLEN_BYTES
];
620 if (dentptr
->name
[0] == DELETED_FLAG
) {
624 if ((dentptr
->attr
& ATTR_VOLUME
)) {
626 (dentptr
->attr
& ATTR_VFAT
) == ATTR_VFAT
&&
627 (dentptr
->name
[0] & LAST_LONG_ENTRY_MASK
)) {
628 prevcksum
= ((dir_slot
*)dentptr
)->alias_checksum
;
629 get_vfatname(mydata
, curclust
,
630 get_dentfromdir_block
,
637 isdir
= (dentptr
->attr
& ATTR_DIR
);
645 if (l_name
[0] != 0) {
652 printf(" %8ld %s%c\n",
653 (long)FAT2CPU32(dentptr
->size
),
665 debug("vfatname: |%s|\n", l_name
);
667 /* Volume label or VFAT entry */
672 if (dentptr
->name
[0] == 0) {
674 printf("\n%d file(s), %d dir(s)\n\n",
677 debug("Dentname == NULL - %d\n", i
);
681 __u8 csum
= mkcksum(dentptr
->name
, dentptr
->ext
);
682 if (dols
&& csum
== prevcksum
) {
689 get_name(dentptr
, s_name
);
691 int isdir
= (dentptr
->attr
& ATTR_DIR
);
701 if (s_name
[0] != 0) {
709 printf(" %8ld %s%c\n",
710 (long)FAT2CPU32(dentptr
->size
),
722 if (strcmp(filename
, s_name
)
723 && strcmp(filename
, l_name
)) {
724 debug("Mismatch: |%s|%s|\n", s_name
, l_name
);
729 memcpy(retdent
, dentptr
, sizeof(dir_entry
));
731 debug("DentName: %s", s_name
);
732 debug(", start: 0x%x", START(dentptr
));
733 debug(", size: 0x%x %s\n",
734 FAT2CPU32(dentptr
->size
),
735 (dentptr
->attr
& ATTR_DIR
) ? "(DIR)" : "");
740 curclust
= get_fatent(mydata
, curclust
);
741 if (CHECK_CLUST(curclust
, mydata
->fatsize
)) {
742 debug("curclust: 0x%x\n", curclust
);
743 printf("Invalid FAT entry\n");
752 * Read boot sector and volume info from a FAT filesystem
755 read_bootsectandvi(boot_sector
*bs
, volume_info
*volinfo
, int *fatsize
)
758 volume_info
*vistart
;
761 if (cur_dev
== NULL
) {
762 debug("Error: no device selected\n");
766 block
= memalign(ARCH_DMA_MINALIGN
, cur_dev
->blksz
);
768 debug("Error: allocating block\n");
772 if (disk_read(0, 1, block
) < 0) {
773 debug("Error: reading block\n");
777 memcpy(bs
, block
, sizeof(boot_sector
));
778 bs
->reserved
= FAT2CPU16(bs
->reserved
);
779 bs
->fat_length
= FAT2CPU16(bs
->fat_length
);
780 bs
->secs_track
= FAT2CPU16(bs
->secs_track
);
781 bs
->heads
= FAT2CPU16(bs
->heads
);
782 bs
->total_sect
= FAT2CPU32(bs
->total_sect
);
785 if (bs
->fat_length
== 0) {
787 bs
->fat32_length
= FAT2CPU32(bs
->fat32_length
);
788 bs
->flags
= FAT2CPU16(bs
->flags
);
789 bs
->root_cluster
= FAT2CPU32(bs
->root_cluster
);
790 bs
->info_sector
= FAT2CPU16(bs
->info_sector
);
791 bs
->backup_boot
= FAT2CPU16(bs
->backup_boot
);
792 vistart
= (volume_info
*)(block
+ sizeof(boot_sector
));
795 vistart
= (volume_info
*)&(bs
->fat32_length
);
798 memcpy(volinfo
, vistart
, sizeof(volume_info
));
800 if (*fatsize
== 32) {
801 if (strncmp(FAT32_SIGN
, vistart
->fs_type
, SIGNLEN
) == 0)
804 if (strncmp(FAT12_SIGN
, vistart
->fs_type
, SIGNLEN
) == 0) {
808 if (strncmp(FAT16_SIGN
, vistart
->fs_type
, SIGNLEN
) == 0) {
814 debug("Error: broken fs_type sign\n");
822 __u8 do_fat_read_at_block
[MAX_CLUSTSIZE
]
823 __aligned(ARCH_DMA_MINALIGN
);
826 do_fat_read_at(const char *filename
, unsigned long pos
, void *buffer
,
827 unsigned long maxsize
, int dols
)
829 char fnamecopy
[2048];
833 fsdata
*mydata
= &datablock
;
834 dir_entry
*dentptr
= NULL
;
835 __u16 prevcksum
= 0xffff;
839 int files
= 0, dirs
= 0;
842 __u32 root_cluster
= 0;
843 int rootdir_size
= 0;
846 if (read_bootsectandvi(&bs
, &volinfo
, &mydata
->fatsize
)) {
847 debug("Error: reading boot sector\n");
851 if (mydata
->fatsize
== 32) {
852 root_cluster
= bs
.root_cluster
;
853 mydata
->fatlength
= bs
.fat32_length
;
855 mydata
->fatlength
= bs
.fat_length
;
858 mydata
->fat_sect
= bs
.reserved
;
860 cursect
= mydata
->rootdir_sect
861 = mydata
->fat_sect
+ mydata
->fatlength
* bs
.fats
;
863 mydata
->sect_size
= (bs
.sector_size
[1] << 8) + bs
.sector_size
[0];
864 mydata
->clust_size
= bs
.cluster_size
;
865 if (mydata
->sect_size
!= cur_part_info
.blksz
) {
866 printf("Error: FAT sector size mismatch (fs=%hu, dev=%lu)\n",
867 mydata
->sect_size
, cur_part_info
.blksz
);
871 if (mydata
->fatsize
== 32) {
872 mydata
->data_begin
= mydata
->rootdir_sect
-
873 (mydata
->clust_size
* 2);
875 rootdir_size
= ((bs
.dir_entries
[1] * (int)256 +
879 mydata
->data_begin
= mydata
->rootdir_sect
+
881 (mydata
->clust_size
* 2);
884 mydata
->fatbufnum
= -1;
885 mydata
->fatbuf
= memalign(ARCH_DMA_MINALIGN
, FATBUFSIZE
);
886 if (mydata
->fatbuf
== NULL
) {
887 debug("Error: allocating memory\n");
892 debug("VFAT Support enabled\n");
894 debug("FAT%d, fat_sect: %d, fatlength: %d\n",
895 mydata
->fatsize
, mydata
->fat_sect
, mydata
->fatlength
);
896 debug("Rootdir begins at cluster: %d, sector: %d, offset: %x\n"
897 "Data begins at: %d\n",
899 mydata
->rootdir_sect
,
900 mydata
->rootdir_sect
* mydata
->sect_size
, mydata
->data_begin
);
901 debug("Sector size: %d, cluster size: %d\n", mydata
->sect_size
,
904 /* "cwd" is always the root... */
905 while (ISDIRDELIM(*filename
))
908 /* Make a copy of the filename and convert it to lowercase */
909 strcpy(fnamecopy
, filename
);
912 if (*fnamecopy
== '\0') {
917 } else if ((idx
= dirdelim(fnamecopy
)) >= 0) {
919 fnamecopy
[idx
] = '\0';
920 subname
= fnamecopy
+ idx
+ 1;
922 /* Handle multiple delimiters */
923 while (ISDIRDELIM(*subname
))
934 debug("FAT read sect=%d, clust_size=%d, DIRENTSPERBLOCK=%zd\n",
935 cursect
, mydata
->clust_size
, DIRENTSPERBLOCK
);
937 if (disk_read(cursect
,
938 (mydata
->fatsize
== 32) ?
939 (mydata
->clust_size
) :
941 do_fat_read_at_block
) < 0) {
942 debug("Error: reading rootdir block\n");
946 dentptr
= (dir_entry
*) do_fat_read_at_block
;
949 for (i
= 0; i
< DIRENTSPERBLOCK
; i
++) {
950 char s_name
[14], l_name
[VFAT_MAXLEN_BYTES
];
954 if (dentptr
->name
[0] == DELETED_FLAG
) {
960 csum
= mkcksum(dentptr
->name
, dentptr
->ext
);
962 if (dentptr
->attr
& ATTR_VOLUME
) {
964 (dentptr
->attr
& ATTR_VFAT
) == ATTR_VFAT
&&
965 (dentptr
->name
[0] & LAST_LONG_ENTRY_MASK
)) {
967 ((dir_slot
*)dentptr
)->alias_checksum
;
971 do_fat_read_at_block
,
974 if (dols
== LS_ROOT
) {
978 (dentptr
->attr
& ATTR_DIR
);
986 if (l_name
[0] != 0) {
993 printf(" %8ld %s%c\n",
994 (long)FAT2CPU32(dentptr
->size
),
1006 debug("Rootvfatname: |%s|\n",
1009 /* Volume label or VFAT entry */
1013 } else if (dentptr
->name
[0] == 0) {
1014 debug("RootDentname == NULL - %d\n", i
);
1015 if (dols
== LS_ROOT
) {
1016 printf("\n%d file(s), %d dir(s)\n\n",
1022 else if (vfat_enabled
&&
1023 dols
== LS_ROOT
&& csum
== prevcksum
) {
1029 get_name(dentptr
, s_name
);
1031 if (dols
== LS_ROOT
) {
1032 int isdir
= (dentptr
->attr
& ATTR_DIR
);
1038 if (s_name
[0] != 0) {
1044 if (s_name
[0] != 0) {
1051 printf(" %8ld %s%c\n",
1052 (long)FAT2CPU32(dentptr
->size
),
1063 if (strcmp(fnamecopy
, s_name
)
1064 && strcmp(fnamecopy
, l_name
)) {
1065 debug("RootMismatch: |%s|%s|\n", s_name
,
1071 if (isdir
&& !(dentptr
->attr
& ATTR_DIR
))
1074 debug("RootName: %s", s_name
);
1075 debug(", start: 0x%x", START(dentptr
));
1076 debug(", size: 0x%x %s\n",
1077 FAT2CPU32(dentptr
->size
),
1078 isdir
? "(DIR)" : "");
1080 goto rootdir_done
; /* We got a match */
1082 debug("END LOOP: j=%d clust_size=%d\n", j
,
1083 mydata
->clust_size
);
1086 * On FAT32 we must fetch the FAT entries for the next
1087 * root directory clusters when a cluster has been
1088 * completely processed.
1091 int rootdir_end
= 0;
1092 if (mydata
->fatsize
== 32) {
1093 if (j
== mydata
->clust_size
) {
1097 nxt_clust
= get_fatent(mydata
, root_cluster
);
1098 rootdir_end
= CHECK_CLUST(nxt_clust
, 32);
1100 nxtsect
= mydata
->data_begin
+
1101 (nxt_clust
* mydata
->clust_size
);
1103 root_cluster
= nxt_clust
;
1109 if (j
== PREFETCH_BLOCKS
)
1112 rootdir_end
= (++cursect
- mydata
->rootdir_sect
>=
1116 /* If end of rootdir reached */
1118 if (dols
== LS_ROOT
) {
1119 printf("\n%d file(s), %d dir(s)\n\n",
1131 int startsect
= mydata
->data_begin
1132 + START(dentptr
) * mydata
->clust_size
;
1134 char *nextname
= NULL
;
1139 idx
= dirdelim(subname
);
1142 subname
[idx
] = '\0';
1143 nextname
= subname
+ idx
+ 1;
1144 /* Handle multiple delimiters */
1145 while (ISDIRDELIM(*nextname
))
1147 if (dols
&& *nextname
== '\0')
1150 if (dols
&& firsttime
) {
1157 if (get_dentfromdir(mydata
, startsect
, subname
, dentptr
,
1158 isdir
? 0 : dols
) == NULL
) {
1164 if (isdir
&& !(dentptr
->attr
& ATTR_DIR
))
1171 ret
= get_contents(mydata
, dentptr
, pos
, buffer
, maxsize
);
1172 debug("Size: %d, got: %ld\n", FAT2CPU32(dentptr
->size
), ret
);
1175 free(mydata
->fatbuf
);
1180 do_fat_read(const char *filename
, void *buffer
, unsigned long maxsize
, int dols
)
1182 return do_fat_read_at(filename
, 0, buffer
, maxsize
, dols
);
1185 int file_fat_detectfs(void)
1188 volume_info volinfo
;
1192 if (cur_dev
== NULL
) {
1193 printf("No current device\n");
1197 #if defined(CONFIG_CMD_IDE) || \
1198 defined(CONFIG_CMD_SATA) || \
1199 defined(CONFIG_CMD_SCSI) || \
1200 defined(CONFIG_CMD_USB) || \
1202 printf("Interface: ");
1203 switch (cur_dev
->if_type
) {
1229 printf("\n Device %d: ", cur_dev
->dev
);
1233 if (read_bootsectandvi(&bs
, &volinfo
, &fatsize
)) {
1234 printf("\nNo valid FAT fs found\n");
1238 memcpy(vol_label
, volinfo
.volume_label
, 11);
1239 vol_label
[11] = '\0';
1240 volinfo
.fs_type
[5] = '\0';
1242 printf("Filesystem: %s \"%s\"\n", volinfo
.fs_type
, vol_label
);
1247 int file_fat_ls(const char *dir
)
1249 return do_fat_read(dir
, NULL
, 0, LS_YES
);
1252 long file_fat_read_at(const char *filename
, unsigned long pos
, void *buffer
,
1253 unsigned long maxsize
)
1255 printf("reading %s\n", filename
);
1256 return do_fat_read_at(filename
, pos
, buffer
, maxsize
, LS_NO
);
1259 long file_fat_read(const char *filename
, void *buffer
, unsigned long maxsize
)
1261 return file_fat_read_at(filename
, 0, buffer
, maxsize
);